What is "Correct EMF Encoding"?

I see this term alot, but have never seen a complete explanation. How does it work in protecting CD’s (as in SafeDisk 2)? What do the letters “EMF” stand for? What are weak sectors? I’m using an AOpen CDW5424 writer. Both CDClone and Alcohol list the drive as “EMF Capable”, but when I run the EMF test file from Alcohol’s website I only get 2 sheep. It fails on the 2.5 & 3 sheep test. Who is right and what is the better software package to buy (CDClone or Alcohol)?

EFM code explained

P.S. EMF is Europian Monetary Fund :smiley: